(19)
(11) EP 2 104 297 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
15.02.2012 Bulletin 2012/07

(43) Date of publication A2:
23.09.2009 Bulletin 2009/39

(21) Application number: 09155377.6

(22) Date of filing: 17.03.2009
(51) International Patent Classification (IPC): 
H04L 27/36(2006.01)
H04L 27/38(2006.01)
 H04L 27/26(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA RS

(30) Priority: 21.03.2008 JP 2008074125

(71) Applicant: Fujitsu Limited
Kawasaki-shi, Kanagawa 211-8588 (JP)

(72) Inventors:
  • Toyomane, Akira
    Kawasaki-shi, Kanagawa 211-8588 (JP)
  • Araki, Katsunori
    Kawasaki-shi Kanagawa 211-8588 (JP)
  • Gonai, Yoshihiro
    Kawasaki-shi, Kanagawa 211-8588 (JP)

(74) Representative: Stebbing, Timothy Charles 
Haseltine Lake LLP Lincoln House, 5th Floor 300 High Holborn
London WC1V 7JH
London WC1V 7JH (GB)

   


(54) Transmission apparatus and transmission method


(57) An transmission apparatus (100B) includes a pseudo data addition section (140A) configured to add pseudo data into transmission data for a free subcarrier of a radio frequency, an OFDM modulator (110) subjecting the transmission data added with the pseudo data to OFDM modulation, a power amplifier (133) amplifying power of a transmission signal of the radio frequency, the transmission signal based on an OFDM signal subjected to the OFDM modulation, an antenna (135) radiating the amplified transmission signal by using the radio frequency; and a distortion compensation circuit (120) compensating for a distortion characteristic of the power amplifier by correcting the OFDM signal with a distortion compensation coefficient accumulated corresponding to the power value of the OFDM signal, outputting the corrected signal for the power amplifier, and monitoring the output of the power amplifier (133) to update the distortion compensation coefficient.







Search report